Skip navigation
Use este identificador para citar ou linkar para este item: http://repositorio.unb.br/handle/10482/43822
Arquivos associados a este item:
Não existem arquivos associados a este item.
Título: The influence of potassium hydroxide concentration and reaction time on the extraction cellulosic jute fibers
Autor(es): Kataoka, Lays Furtado de Medeiros Souza
Hidalgo Falla, Maria Del Pilar
Luz, Sandra Maria da
ORCID: https://orcid.org/ 0000-0003-1766-7509
https://orcid.org/ 0000-0002-2223-0021
Assunto: Alfa celulose
Holocelulose
Fibra de juta
Planejamento fatorial
Alcalinização
Propriedades térmicas
Data de publicação: 8-Jun-2021
Editora: Taylor & Francis
Referência: KATAOKA, Lays Furtado de Medeiros Souza; HIDALGO FALLA, Maria Del Pilar; Luz, Sandra Maria da. The influence of potassium hydroxide concentration and reaction time on the extraction cellulosic jute fibers. Journal of Natural Fibers, 2021. DOI: https://doi.org/10.1080/15440478.2021.1934934.
Abstract: A common method used to obtain cellulosic fibers is alkalinization with NaOH. Depending on NaOH content, treatments remove significant quantities of lignin and hemicellulose as small molecules. In biorefineries, where the preservation of components is needed, KOH may prevent hemicellulose chain formation. Here, we studied the efficacy of obtaining cellulosic fibers from jute using KOH. Jute fibers are about 84.2% holocellulose, which corresponds to 59.5% alpha cellulose and 24.7% hemicellulose. To obtain high cellulosic fiber yields from jute, effects of pulping with different KOH concentrations and altering reaction times were studied using factorial planning (22). Afterward, in natura and treated fibers were characterized via Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG) and derivative thermogravimetry. Holocellulose sample components were obtained by removing lignin. Factors including concentration and reaction time individually significantly affected cellulose yield. Alpha cellulose was produced when higher levels of the factorial planning conditions were applied. Ideal parameters for cellulose extraction included the addition of 10% (w/v) KOH for 3 h. FTIR analysis was used to ensure that lignocellulosic components were removed by fiber treatment. TG showed that treated fibers were thermally stable at temperatures close to, or higher than, in natura fibers.
Unidade Acadêmica: Faculdade UnB Gama (FGA)
DOI: https://doi.org/10.1080/15440478.2021.1934934
Versão da editora: https://www.tandfonline.com/doi/full/10.1080/15440478.2021.1934934
Aparece nas coleções:Artigos publicados em periódicos e afins

Mostrar registro completo do item Visualizar estatísticas



Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.